UNITED STATES

SECURITIES AND EXCHANGECOMMISSION

Washington, D.C.20549

FORM 6-K

Report of Foreign PrivateIssuer
Pursuant to Rule 13a-16 or 15d-16 of the

Securities ExchangeAct of 1934

For the month ofAugust, 2025

Commission File Number1-15106

PETRÓLEO BRASILEIROS.A. – PETROBRAS

(Exact name of registrantas specified in its charter)

Brazilian PetroleumCorporation – PETROBRAS

(Translation of Registrant'sname into English)

Avenida Henrique Valadares, 28 – 9th floor 
20231-030 – Rio de Janeiro, RJ
Federative Republic of Brazil

(Address of principalexecutive office)

Indicate by check markwhether the registrant files or will file annual reports under cover Form 20-F or Form 40-F. 

Form 20-F ___X___ Form40-F _______

Indicate by check markwhether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commissionpursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes _______ No___X____

Petrobras informs about the paymentof remuneration to shareholders

—

Rio de Janeiro, August 20, 2025 – PetróleoBrasileiro S.A. – Petrobras, following up on the Material Fact published on 05/12/2025, informs that it will make today the paymentof the first installment of shareholder remuneration relating to the balance sheet of March 31, 2025.

The gross amount to be distributed today, entirelyin the form of interest on equity, corresponds to R$ 0.45458310 per common and preferred share.

Credit instructions

The payment will be made by Banco Bradesco S.A. (Bradesco),institution depositary of book-entry shares. All shareholders, who have their registration duly updated, will have their rights automaticallycredited to their bank accounts today. More information can be obtained through any Bradesco branch or by calling 0800-7011616.

For shareholders with custody in B3, the payment willbe done by deposit brokers.

Forholders of American Depositary Receipts (ADRs) negotiated on the New York Stock Exchange (NYSE), the payment will be made as of August27, 2025 by JP Morgan Chase, depositary bank of ADRs. Information and clarifications may be obtained at www.adr.com.

Rights not claimed within 3 (three) years from thedate of payment (08/20/2025) will lapse and revert to the Company (according to Law 6404/76, article 287, clause II, item a).

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934,the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: August 20, 2025

PETRÓLEO BRASILEIRO S.A–PETROBRAS

By: /s/ Fernando Sabbi Melgarejo

______________________________

Fernando Sabbi Melgarejo

Chief Financial Officer and Investor RelationsOfficer